There's definitely some minor differences, but they are also definitely minor. They are apparent enough that if you stare at them you can notice them, but honestly, how many people actually stop and stare at textures in-game? They are so minor that unless you make a habit of walking right up to walls and looking at them close range, you won't actually notice them while playing.

I appreciate that Bethesda went through the effort, but I'm not sure it was really worth it.